Monitoring of fecal indicators in rivers on the basis of random sampling and percentiles

Niemi, R. Maarit; Niemi, Jorma

doi:10.1007/bf00280633

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…Regardless of source, storm events clearly increased levels of indicator bacteria and Aeromonas throughout the watershed. Indicator bacteria rose approximately one log unit during storm events (Table 3) and this supports other findings that the level of indicator bacteria in fresh water may increase following rainfall (Culley & Phillips 1982; Niemi & Niemi 1990; Wyer et al . 1995).…”

Section: Discussionsupporting

confidence: 89%

Population dynamics ofAeromonasspp. in an urban river watershed

Pettibone

1998

Journal of Applied Microbiology

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Density of Aeromonas spp. at one site in the Buffalo River and at four sites on its upstream tributaries was followed from June 1992–June 1993. Membrane filtration counts of Aeromonas during the summer ranged between 18 and 4000 ml−1, which were one to two logs higher than faecal coliform and faecal streptococci densities. Aeromonas spp. in the Buffalo River, and faecal coliforms, faecal streptococci, and the heterotrophic plate count throughout the watershed, increased by approximately one log during summer rainstorms. However, Aeromonas spp. increased only by a factor of two during rainstorms at the upstream sites. Aeromonas spp. showed a strong positive correlation with both indicator bacteria and total suspended solids at the upstream sites during the summer but not the winter. Correlations between Aeromonas and indicator bacteria remained strong in the Buffalo River during the winter, signifying that different conditions exist in the Buffalo River and its upstream tributaries. The strong correlation between Aeromonas spp. and indicator bacteria in the Buffalo River suggest that, in the absence of media capable of the quantitative recovery of potentially pathogenic aeromonads, standard faecal coliform analyses may adequately assess public health risks from Aeromonas spp. in an urban river used for recreational purposes.

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Section: Discussionsupporting

confidence: 89%

Population dynamics ofAeromonasspp. in an urban river watershed

Pettibone

1998

Journal of Applied Microbiology

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Fecal contamination of Finnish fresh waters in 1962?1984

Poikolainen

Niemi

et al. 1995

Water Air Soil Pollut

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Relationships Among Epipelic Diatom Taxa, Bacterial Abundances and Water Quality in a Highly Polluted Stream Catchment, Bursa – Turkey

Dere

Dalkıran

Karacaoğlu

et al. 2006

Environ Monit Assess

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Nilüfer Stream is an important water source in the industrial and metropolitan city of Bursa, Turkey. The stream catchment has been influenced by high human impact. The downstream receives sewage water from households and industry, whereas the headwater of the stream has a source of high-quality drinkable water. In this paper, abundances of epipelic diatom taxa, faecal coliforms (FC), total coliforms (TC) and total bacteria (TB) were studied in relation to measured environmental variables (T, pH, DO, BOD(5), EC, TDS) for the period July 1997 to June 1998 at six stations in the heavily polluted Nilüfer Stream catchment. It is observed that the physicochemical variables and bacterial abundances varied seasonally at all stations, and the level of pollution reached at its highest point in the summer. The results of Kruskal-Wallis and one-way ANOVA indicated that DO gradually decreased, whereas BOD(5), EC, TDS, TB, FC and TC gradually increased from upstream to downstream. The ordination method of Principal Component Analysis (PCA) was carried out for both biologic and physicochemical variables, and the results were supported by the former statistical procedures. The frequency of occurrence of dominant diatoms was examined in relation to the spatial variations in chemical constituents. Both diatoms and bacteria showed strong correlations with the measured physicochemical variables. In Canonical Correlation Analysis (CANCORR) measures of bacterial abundances also displayed strong correlations with abundances of 11 diatom taxa. The results showed that the stream catchment is polluted gradually from upstream to downstream. In addition, pollution load in the stream catchment has been gradually increased, compared with recent years. Urbanisation and industrialisation of the city have affected increasing pollution in Nilüfer Stream. The results also indicated that diatoms are not affected by environmental variables such as bacteria. Bacteria are more sensitive to organic pollution, while diatoms are indicators of different environmental conditions.

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Monitoring of fecal indicators in rivers on the basis of random sampling and percentiles

Cited by 6 publications

References 14 publications

Population dynamics ofAeromonasspp. in an urban river watershed

Population dynamics ofAeromonasspp. in an urban river watershed

Fecal contamination of Finnish fresh waters in 1962?1984

Relationships Among Epipelic Diatom Taxa, Bacterial Abundances and Water Quality in a Highly Polluted Stream Catchment, Bursa – Turkey

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